That's the thing, he's perfectly fine around me, my boyfriend, our roommate, his daughter, my sisters.. And maybe three other people. Anyone else, even people he's known since he was a puppy, he's now afraid of and has been for the past year. Though sometimes, he will take a liking to someone new and be perfectly fine around them. This only happens rarely though. The vet has never found any infection, and even said we don't HAVE to get him neutered, cause he's still healthy, it's just to err on the side of caution for when he gets older...